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HelpEpic Test Code LAB104 Magnesium, RBC
Additional Codes
ARUP:0092079
Performing Location(s)
ARUP
Ordering Recommendation
May be useful in the assessment of tissue stores. For routine assessment of magnesium deficiency, Magnesium, Plasma or Serum.
Specimen Type
Centrifuge sample within 2 hours of collection, remove plasma from sample and discard the plasma. Leave remaining RBC's in original collection tube indicating RBC's only on specimen.
Preferred Container
Royal Blue (EDTA) Trace Element tube
Minimum Volume
0.6 mL RBC's
Storage Requirements
Room temperature. Also acceptable: Refrigerated
Specimen Stability
Ambient: 1 week
Refrigerated: 1 week
Frozen: Unacceptable
Transportation Needs
Room temperature. Also acceptable: Refrigerated
Causes for Rejection
Mislabeled or unlabeled specimen.
Less than 50% draw for Vacutainer tubes
Specimens collected in tubes other than royal blue (EDTA).
Specimens transported in containers other than Royal Blue (EDTA) tube.
Clotted or grossly hemolyzed specimens.
Refrance Ranges
1.5-3.1 mmol/L
Interpretive Data
RBC magnesium results reflect the intracellular stores and general homeostasis of magnesium. Results may be falsely low if RBCs in the submitted specimen are lysed or not promptly separated from plasma. To convert to mg/dL, multiply mmol/L by 2.43.
Turnaround Time
1-3 days
Days of Analysis
Sun-Sat
Available STAT
No
Methodolgy
Quantitative Inductively Coupled Plasma-Mass Spectrometry
CPT Code
83735
Last Updated
15-Jan-20